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Updated Impression Materials ( Dental Materials ) MCQs – New Medical MCQs

Updated Impression Materials ( Dental Materials ) MCQs – New Medical MCQs

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Latest Medical MCQs

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Latest Impression Materials ( Dental Materials ) Mcqs

The most occurred mcqs of Impression Materials ( Dental Materials ) in past papers. Past papers of Impression Materials ( Dental Materials ) Mcqs. Past papers of Impression Materials ( Dental Materials ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Impression Materials ( Dental Materials ) Mcqs. The Important series of Impression Materials ( Dental Materials ) Mcqs are given below:

4th state of matter is______________?

A. Liquid
B. Solid
C. Gas
D. Colloid

All of the following statements about an alginate impression are EXCEPT________________?

A. It will take up water and expand if kept wet
B. It may exhibit fluid exudates on the surface as a result of imbibition of water
C. It should be rapidly displaced from the mouth
D. It will shrink as a result of syneresis

Type I and Type II zinc oxide impression paste differ with respect to_______________?

A. Water content
B. Their hardness after setting
C. Their use
D. Eugenol content

The term given to the phenomenon of moisture absorption by an alginate impression in________________?

A. Imbibition
B. Hysteresis
C. Syneresis
D. Gelation

The impression with the least dimensional change upon disinfection is_______________?

A. Addition poly silicone
B. Polysulphide
C. Agar-agar
D. Polyether

Palladium is added to polyvinyl siloxane to_____________?

A. Act as a scavenger
B. Acts as plasticizer
C. Helps as surfactant
D. Acts as a catalyst

Immediate pouring of impressions is most critical in_____________?

A. Condensation polysillicon
B. Polyether
C. Addition Polysilicon
D. A and B

The impression material used to record the prepared areas on abutment teeth is______________?

A. Medium viscosity elastomeric impression material
B. High viscosity elastomeric impression material
C. Low viscosity elastomeric impression material
D. None of the above

Alginate impression material is________________?

A. Thermoplastic impression material
B. Non-elastic impression material
C. More mucostatic than ZOE
D. Less mucostatic than ZOE

Syringe material is______________?

A. Medium viscosity elastomer
B. High viscosity elastomer
C. Medium & low viscosity elastomer
D. Low viscosity elastomer

The impression for a diagnostic cast of a partial edentulous mouth should be taken in_______________?

A. Modelling compound
B. Impression wax
C. Hydro-colloid
D. Hydro cal

Agar impression materials differ from alginate impression materials in that the former sets by_______________?

A. Evolution
B. Physical change
C. Mechanical action of saliva
D. Chemical change

Which material undergoes hysteresis ?

A. Impression plaster
B. Reversible hydrocolloid
C. Irreversible hydrocolloid
D. Metallic oxide paste

The setting time of irreversible hydrocolloids can be decreased by_____________?

A. Raising the temperature of water used for maxing
B. Lowering the temperature of water used for mixing
C. Using excess water for maxing
D. None of the above

Rubber base impressions are poured immediately as they_______________?

A. Continue to polymerize
B. Show imbibition and syneresis
C. Become elastic
D. Show gelation

Restorative Resins MCQs

The most mucostatic impression material is_______________?

A. Thin mix of plaster of paris
B. Free flowing wax
C. Zinc oxide eugenol impression paste
D. Reversible hydrocolloids

The best way to remove a hydrocolloid impression from the patient’s mouth is____________?

A. Wetting the periphery of the impression with moist cotton to break the peripheral seal
B. Slight rocking of the impression to disengage it from the undercut
C. Sudden jerking of the impression to prevent tearing
D. Supporting the impression along with the tray to prevent disengaging of the tray alone

Palatal secretions affect the setting of all the impression materials except_______________?

A. Impression paste
B. Agar-agar
C. Silicone
D. Impression plaster

Lenolin is added is ZOE paste to______________?

A. Accelerate reaction
B. Increase flow
C. Decrease flow
D. Decrease irritation due to eugenol

Agar is prepared from_______________________?

A. Chemicals
B. Bullock heart
C. Sea weed
D. Chick cells

Perforated impression tray are used for_______________?

A. Alginate
B. Agar-agar
C. Zinc oxide-eugenol
D. Impression compound

During setting of alginate impression materials________________?

A. Colloidal changes to sol
B. Trisodium phosphate reacts with calcium sulphate
C. Trisodium phosphate reacts with sodium alginate
D. Material in contact with soft tissues sets last

K2SO4 in agar-agar is for_______________?

A. Accelerating the setting stage of gypsum
B. Give dimensional stability
C. Increase strength
D. None of the above

Wash or corrective impression is done by______________?

A. Alginate
B. Impression paste
C. Impression plaster
D. Rubber base impression material

The plasticizers used in polyether impression material is_______________?

A. Colloidal silica
B. polyether polymer
C. Glycol ether
D. Di-vinyl poly (dimethyl siloxane)

In reversible hydrocolloid the property by which the transformation from sol to gel and gel to sol is a function of the_____________?

A. Concentration of potassium sulphate
B. Percentage composition by weight of water
C. Concentration of filler and plasticizer
D. Temperature

Alginates are_____________?

A. Gel
B. Sol
C. Hydrocolloid
D. Colloid

Syneresis is associated with______________?

A. Hydrocolloids
B. Zinc oxide eugenol
C. Elastomers
D. Plaster of paris

The advantage of ZOE impression paste_______________?

A. Has dimensional stability
B. Is easy manipulation
C. Does not adhere to tissues
D. Does not require special trays

Rinsing of the impression is important to________________?

A. Hydrate the impression
B. Remove saliva
C. Remove excess impression material
D. Accelerate the setting

Which is best material for RPD impression_______________?

A. Reversible hydroollioid
B. Irreversible hydrocolloid
C. Impression plaster
D. None of the above

Which of the following is not affected by saliva ?

A. Impression paste
B. Impression plaster
C. Silicon impression material
D. None of the above

Retarder in Zinc oxide eugenol is______________?

A. Zinc acetate
B. CaCl2
C. Alcohol
D. Glycerine

The cross linking agent of polysulphide rubber base impression material is______________?

A. Stannous octate
B. Aromatic sulfonate esters
C. Platinum salt catalyst
D. Lead dioxide

When making a polysulphide impression for a caste crown, custom trays are usually preferred over stock trays for all of the following reasons except_______________?

A. Custom trays require less impression material
B. Custom trays facilitate uniform contraction of impression material
C. Stock trays may be short in the flange area
D. Impressions made n the custom trays are easier to remove from the mouth

Name the accelerator used in Zinc oxide eugenol paste______________?

A. Linseed oil
B. Olive oil
C. Zinc acetate
D. All of these

Linear contraction of elostomeric impression with passage of time is highest in______________?

A. Polysulphide
B. Addition silicone
C. Polyetner
D. Condensation silicone

Which of the following is true about Agar hydrocolloid impression material ?

A. Liquefies between 71 – 100°C
B. Facilitates fabrication of metal dyes
C. Solidfies between 50 – 70°C
D. Cannot register fine surface details

Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?

A. Borax
B. Sulfates
C. Water
D. Carbonates

The water powder ratio of alginate is______________?

A. 40 ml of water to 40 gms of powder
B. 100 ml of water to 60 gms of powder
C. 40 ml of water to 15 gms of powder
D. 15 ml of water to 40 gms of powder

Best impression material to be used for securing impression after crown preparation_______________?

A. Agar
B. Alginate
C. Elastome
D. Zno paste

Amalgams MCQs

Which of the following is correct glass transition temperature of Impression compound ?

A. 65°C
B. 39°C
C. 43.5°C
D. 100°C

Rough and irregular surface produced on the impression is because of_______________?

A. Improper application of pressure during impression making
B. Air incorporated during mixing
C. Presence of excessive saliva in impression area
D. Due to improper ratio of polymer and monomer

Minimum flow of Type-I impression compound at mouth temperature is___________________?

A. 8%
B. 6%
C. 4%
D. 10%

Polysulfide material is routinely not recommended because of_______________?

A. Unpleasant odor and taste
B. Least permanent deformation
C. Low accuracy
D. Highest curing shrinkage

Hydrocolloid material, show all except______________?

A. Imbibition
B. Hysterisis
C. Recrytallisation
D. Syneresis

Impression material that Do NOT harden by chemical reaction_______________?

A. Alginate
B. Impression compound
C. Zinc oxide eugenol
D. Plaster of paris

Putty wash technique_________________?

A. Light body first and putty later
B. Putty used first and light body used second
C. Light body and putty used at the same time
D. None of the above

What is the minimum thickness of the elastomeric impression material for an accurate impression_______________?

A. 2-4 mm
B. 2 mm
C. Greater than 3 mm
D. Maximum in the area of operation

The relative hardness of elastomere is determined using________________?

A. Barcol indenter
B. Rockwell tester
C. Knoop pyramid
D. Shore durometer

Rough surface of elastomeric impression results from_______________?

A. Air bubbles
B. Inadequate mixing
C. Too rapid polymerization
D. Incomplete polymerization caused by premature removal from mouth

Most rigid elastomer is___________________?

A. Polyether
B. Addition silicone
C. Polysulphide
D. Condensation silicone

Most ideally elastic among the following_______________?

A. Polysulphide
B. Addition silicone
C. Polyether
D. Condensation silicone

Which one of the following impression materials is elastic, sets by a chemical reaction and is catalyzed by chloroplatinic acid_______________?

A. Polyether
B. Condensation silicone
C. Polysulfide
D. Poly vinyl siloxane

Which of the following best describes the working time of elastomeric impression material ?

A. Loss of luster of impression material
B. Just after the start of appearing elastic properties of impression material
C. Just before the start of appearing elastic properties of impression material
D. After the start of appearing elastic properties of impression material

Final product in alginate is________________?

A. Potassium alginate
B. Sodium alginate
C. Trisodium phosphate
D. Calcium alginate

Dustless alginate is produced by______________?

A. Reducing the diatomaceous earth
B. Altering the matrix
C. Coating with dihydric alcohol
D. Adding heavy metal salts

Two in one stage impression materials include______________?

A. Hydrocolloid impression material
B. Zinc Oxide eugenol impression paste
C. Elastomeric impression material
D. All of the above

A technique of combining reversible and irreversible hydrocolloid that could bond to irreversible hydrocolloid is known as________________?

A. Immersion technique
B. Laminate technique
C. Injecting technique
D. Tempering technique

Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?

A. Condensation polysilicone
B. Addition polysilicone
C. Polyether
D. Polysulfide

Updated Impression Materials ( Dental Materials ) MCQs – New Medical MCQs